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Zhou C, Zhu W, Chang X, Ding D, Zhang T, Chen J, Wu H, Yang H, Sun L. Mechanism study of enhanced interaction between gaseous elemental mercury and hydroxylated UIO-66. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22004-22013. [PMID: 32291637 DOI: 10.1007/s11356-020-08415-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
Novel hydroxylated UIO-66 for gaseous elemental mercury (Hg0) removal has been considered to be an emerging method because of its economical and reusable property. Density functional theory studies were investigated to reveal the enhanced heterogeneous interaction mechanisms between mercury and hydroxylated UIO-66 with and without the presence of H2O2 vapor. The adsorption and dissociation of H2O2 and the generation mechanism of surface hydroxyls on UIO-66 were investigated. Results indicated that H2O2 preferred to disconnect the O-O bond followed by the generation of two hydroxyls in the presence of H2O2. The hydroxyl adsorbed on UIO-66 and formed the UIO-66 hydroxylation product. The interaction performances between Hg0, H2O2, and UIO-66 as well as the interaction performances between Hg0 and hydroxylated UIO-66 systems were both evaluated through binding energy and the Mulliken charge analysis. Interacted energies indicated thermodynamically favorable processes of Hg-OH formation on hydroxylated UIO-66. The Mulliken charge changes revealed an oxidative process of mercury.
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Affiliation(s)
- Changsong Zhou
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China.
| | - Wenxin Zhu
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Xiong Chang
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Ding Ding
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Tingting Zhang
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Jiamin Chen
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Hao Wu
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Hongmin Yang
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Lushi Sun
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
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